客戶端和服務器端（JavaScript和PHP驗證）

如何建立客戶端驗證，僅使用JavaScript檢查空字段並在服務器端使用PHP驗證電子郵件和用戶名。我是一名初學者。客戶端和服務器端（JavaScript和PHP驗證）

到目前爲止，我已經在客戶端

<script type="text/javascript"> 

     function checkme() 
     { 
      if(document.myform.uname.value == "") 
      { 
       alert("Please Enter your User Name") 
       document.myform.uname.focus(); 
       return false; 
      } 

      if(document.myform.mail.value == "") 
      { 
       alert("Please Enter Your E-mail Address"); 
       document.myform.mail.focus(); 
       return false; 
      } 
return true; 

} 

    </script> 
    </head> 
<body> 

    <form name="myform" method="POST" action="index.php" onsubmit="return checkme();"> 


     User Name : <input type="text" name="uname" /><label> * </label> 
     <br /> 

     E-Mail : <input type="text" name="mail" /><label> * </label> 
     <br /> 
     <input type="submit" name="register" value="Register" /> 


    </form> 

</body>

到目前爲止，我已經在服務器端

<?php 

    $uname = $_POST["uname"]; $unameerr = $mailerr = "" ; 
    $mail = $_POST["mail"] ; 

    if (! isset($_POST['register'])) 
    { 
     echo "You need to submit the form " ; 
    } 

    if (empty($_POST["uname"]) || empty($_POST["mail"])) 
    { 
     echo "All fields are required" ; 
     exit ; 
    } 

    if ($_SERVER["REQUEST_METHOD"] == "POST") 
    { 
    if(strlen($_POST["uname"])< 2 || (strlen($_POST["uname"])>12)) 

      { 
       $unameerr = "Please Enter your USER NAME with in 2-12 characters" ; 
      } 
      else 
      { 
       $uname = $_POST["uname"] ; 
      } 

     if(!preg_match("/^[A-Za-z0-9_.]+\@+[A-Za-z]+\.+[a-z{2,4}]$/", $mail)) 

      { 
       $mailerr = "Please Enter your email address in correct format[[email protected]]" ; 
      } 
      else 
      { 
       $mail = $_POST["mail"] ; 
      } 
    }  
    echo "Your inputs are :" ; 

    echo "<br />" ; 

    echo "Your User name is : " . $uname ; 

    echo "<br />" ; 

    echo "Your Registered E-mail is : " . $mail ; 






    ?> 

    <form>  <input type="button" value="Print A Copy" onsubmit="window.print()" /> </form>

任何建議所做的一切???

來源

2014-01-19 tankit88

所以......有什麼用，這個問題？有用？有什麼錯誤？什麼？ – arieljuod

請讓我們知道您在代碼中面臨的困難。清楚地向我們解釋你需要什麼。這將幫助我們回答你的問題，你非常歡迎StackOverflow btw :) – Kirk